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惯用PHP正则表达式

Jun 13, 2016 pm 01:08 PM
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常用PHP正则表达式

匹配中文字符的正则表达式: [\u4e00-\u9fa5]?
评注:匹配中文还真是个头疼的事,有了这个表达式就好办了?
匹配双字节字符(包括汉字在内):[^\x00-\xff]?
评注:可以用来计算字符串的长度(一个双字节字符长度计2,ASCII字符计1)?
匹配空白行的正则表达式:\n\s*\r?
评注:可以用来删除空白行?
匹配HTML标记的正则表达式:]*>.*?\1>|<.>?
评注:网上流传的版本太糟糕,上面这个也仅仅能匹配部分,对于复杂的嵌套标记依旧无能为力?
匹配首尾空白字符的正则表达式:^\s*|\s*$?
评注:可以用来删除行首行尾的空白字符(包括空格、制表符、换页符等等),非常有用的表达式?
匹配Email地址的正则表达式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*?
评注:表单验证时很实用?
匹配网址URL的正则表达式:[a-zA-z]+://[^\s]*?
评注:网上流传的版本功能很有限,上面这个基本可以满足需求?
匹配帐号是否合法(字母开头,允许5-16字节,允许字母数字下划线):^[a-zA-Z][a-zA-Z0-9_]{4,15}$?
评注:表单验证时很实用?
匹配国内电话号码:\d{3}-\d{8}|\d{4}-\d{7}?
评注:匹配形式如 0511-4405222 或 021-87888822?
匹配腾讯QQ号:[1-9][0-9]{4,}?
评注:腾讯QQ号从10000开始?
匹配中国邮政编码:[1-9]\d{5}(?!\d)?
评注:中国邮政编码为6位数字?
匹配身份证:\d{15}|\d{18}?
评注:中国的身份证为15位或18位?
匹配ip地址:\d+\.\d+\.\d+\.\d+?
评注:提取ip地址时有用?
匹配特定数字:?
^[1-9]\d*$    //匹配正整数?
^-[1-9]\d*$   //匹配负整数?
^-?[1-9]\d*$   //匹配整数?
^[1-9]\d*|0$  //匹配非负整数(正整数 + 0)?
^-[1-9]\d*|0$   //匹配非正整数(负整数 + 0)?
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$   //匹配正浮点数?
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$  //匹配负浮点数?
^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$  //匹配浮点数?
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$   //匹配非负浮点数(正浮点数 + 0)?
^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0?\.0+|0$  //匹配非正浮点数(负浮点数 + 0)?
评注:处理大量数据时有用,具体应用时注意修正?
匹配特定字符串:?
^[A-Za-z]+$  //匹配由26个英文字母组成的字符串?
^[A-Z]+$  //匹配由26个英文字母的大写组成的字符串?
^[a-z]+$  //匹配由26个英文字母的小写组成的字符串?
^[A-Za-z0-9]+$  //匹配由数字和26个英文字母组成的字符串?
^\w+$  //匹配由数字、26个英文字母或者下划线组成的字符串?

使用例子:?
Php代码??收藏代码
  1. if(ereg("(^[0-9]*[1-9][0-9]*$)",$Phone))??
  2. {??????//判断是否是电话号码,在PHP使用??
  3. ??//var_dump(ereg("/^\d+$/",$Phone));??
  4. }??


Js代码??收藏代码
  1. var?reg?=?/^[0-9]*[1-9][0-9]*$/;??
  2. ?if?(!reg.exec(par))?{??
  3. ????alert("必须输入数字");??
  4. ????return?false;??
  5. ???//window.event.returnValue=false;??
  6. ????}??

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